S355JR steel plate is a widely used non-alloy structural steel produced under EN 10025-2 standards. As a professional manufacturer and supplier,
GNEE Steel provides high-quality S355JR steel plates with reliable chemical composition, mechanical strength, and excellent processing performance for global construction, bridge, machinery, and shipbuilding projects.
S355JR steel plate
S355JR steel plate is known for its high tensile and yield strength, excellent weldability, and impact resistance, making it suitable for harsh environments and heavy-load applications.
Cutting Performance of S355JR Steel Plate
Understanding the cutting performance of S355JR steel plate is critical for optimizing fabrication processes.
Processing Methods: Drilling, milling, turning, laser cutting, and plasma cutting
Key Parameters: Cutting force, surface roughness, and processing efficiency
Benefits: Reduces tool wear, improves surface finish, and increases production efficiency
Practical Tip: Adjust cutting speed and feed rate according to thickness to achieve optimal results.
Formability of S355JR Steel Plate
S355JR steel plate formability determines how well the material can be shaped without cracking or losing strength.
Cold Bending & Hot Bending: Smooth plastic deformation, predictable stress distribution
Stretching: Suitable for shaping into curves or cylindrical structures
Sheet Metal Applications: High precision in structural fabrication
Key Advantage: Excellent plasticity allows complex shapes without compromising mechanical integrity.
Welding Performance of S355JR Steel Plate
Welding is a critical process for structural steel. S355JR steel plate offers excellent weldability:
Compatible with other structural steels
Supports MIG, TIG, arc welding methods
Welding area microstructure remains uniform with proper parameters
Minimal risk of cracking or brittleness post-weld
Tip: Proper preheating and controlled heat input improve toughness and prevent weld defects.
Microstructure and Mechanical Performance After Processing
Processing may influence microstructure and performance:
| Property | S355JR Steel Plate | Unit |
|---|---|---|
| Yield Strength | 355 | MPa |
| Tensile Strength | 470–630 | MPa |
| Elongation | ≥22 | % |
| Impact Energy | ≥27 (at 20°C) | J |
| Hardness | 140–180 | HB |
Corrosion and Wear Resistance
Corrosion Resistance: Suitable for humid and rainy environments
Wear Resistance: High surface hardness ensures long service life in industrial applications
Durability: Ideal for bridges, transmission towers, ships, and machinery
Bullet Points – Key Advantages of S355JR Steel Plate
High tensile and yield strength
Excellent impact toughness
Easy processing: cutting, drilling, welding, riveting
Good wear and corrosion resistance
Suitable for harsh environmental conditions
Applications of S355JR Steel Plate
S355JR steel plate is widely used across multiple industries:
- Construction: Structural beams, frames, and load-bearing elements
- Bridges & Infrastructure: Highway, railway, and pedestrian bridges
- Machinery Manufacturing: Heavy-duty frames and components
- Shipbuilding & Offshore: Marine structures exposed to high stress and humidity
S355JR steel plate combines excellent mechanical properties, corrosion resistance, wear resistance, and superior processing performance, making it a preferred choice for construction, bridge engineering, machinery, and shipbuilding projects.
What is S355JR equivalent to?
S355JR equivalent grades have very close chemical composition and mechanical properties to that of S355JR steel. Both the S355JR equivalent grades Q345B, A572 Gr 50, ST52-3, SM490B and S355JR steel are main products of Gnee steel.
What is the difference between S275JR and S355JR?
S275JR: Offers a minimum yield strength of 275 MPa for thicknesses up to 16 mm. This makes it suitable for applications where moderate strength is sufficient. S355JR: Provides a higher minimum yield strength of 355 MPa for thicknesses up to 16 mm, making it ideal for projects requiring greater load-bearing capacity.
What is S355JR steel?
355JR is a grade of low-carbon steel commonly used in structural applications. It is part of the 'S' family of steels, which includes S235, S275, and S355 grades. The "JR" designation means that the material has been subjected to a Charpy V-notch impact test at 208℃ and has a minimum impact strength of 27 Joules.